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Finding the Fourth Proportional to 188,715.80, 260,294.64 and 128,250.92

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Solution

The fourth proportional to 188,715.80, 260,294.64 and 128,250.92 is: 176,895.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,715.80 : 260,294.64 = 128,250.92 : x
  2. Step 2: Convert to fraction form
    188,715.80/260,294.64 = 128,250.92/x
  3. Step 3: Cross multiply
    188,715.80x = 260,294.64 × 128,250.92
  4. Step 4: Simplify right side
    188,715.80x = 33,383,027,051.07
  5. Step 5: Solve for x
    x = 33,383,027,051.07/188,715.80
  6. Step 6: Final answer
    x = 176,895.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.